Power over Ethernet (PoE) 101: It's Cool | Dong Knows Tech
Amazon.com: Mikrotik RouterBoard RB750UPr2 hEX PoE lite is a Small 5 Port Router, 1 USB 2.0 Port and PoE Output. Ports 2-5 can Power Other PoE Capable Devices with The Same Voltage
NetcamCenter NCC-WiFi-PoE-Injector-30W | Other Products | NetcamCenter
OPTICAL MODEM GPON FK-ONT-G400B/PoE S2 | Furukawa Electric LatAm
huawei eg8020p gpon poe 2ge gateway| Alibaba.com
Amazon.com: Poe Router
My solution for using PoE port to power cable modem : r/mikrotik